Safety-bung.



VV. H. McNUTT.

SAFETY BUNG.

APPLICATION FILED AUG. 1913.

l lzltentedJunc 15, 1915.`

f ig, 1 /lo Fig. d5.

'- i nn suaves PMnewv www@ WILLIAM H. MONUTT, or NEW Yoan, N. Y., ,nssIeNon 'ro-sauren FRANKLIN, New vean Enne. ownN, on

. lenssen-enne.

To all whom it may concern:

Be it known that WmLIAM H. Molur'r, a citizen of the United States, and a resident of New York nity, ill-the county of New York and State of New York, have invented certain new and useful improvements in Safety-Bungs, of whichthe following is a specification.

This .invention relates to safety bungs, and it proposes an improved device ofthe character stated, which is designed forapplication to barrels, cans, ete., and lis equipped with a specially constructed fusible venting portion coperative with the safety valve, all as hereinafter described.

ln `the accompanying drawing showing one embodiment of my invention,.Figure `shows the top portion of a container with the bung in position. F ig. 2 shows in section the bung attached. F ig. 3 is a'perspective View of the bung; and Fig. 4 shows a plan of the bung. l

In the drawings, i, is a container provided with a head 2 and chime 3. At l an internally threaded collar orl sput 5 is set in the barrelheadto form -a bung hole. Flange 5, is provided by :meansl ofwhich the sput is riveted or welded to the head.

The threaded portion of the sputmay eX- tend some distance beyond the end of the bung. The bung consists of another member or casing provided with an upward eX- tension or head 7, having a square or polygonal opening S, wherein a wrench may be seated, and a sleeve-like inner member or lining 19. Obviously, instead of thus pro-- viding the bung head with an inside squaredr recess, the bung head may be squared outv sideto engagea wrench. The lower extension ofthe bung casing is threaded at 9 to t in the head of the barrel.. An annular lug 10 may, ifdesied be rovided to allow the use of a gasket should 1t be needed. The above mentioned sleeve or lining 19, which is made `of fusible metal, is secured in the bore of the bung casing, preferably' by being cast therein, and may be locked in positionl by providing recesses 1.7i, inthe wall of said bore, linto which resses extend pro jections l2 from the .sleeve 19.

The bore of the sleeve contains a valve 16, whose stem-1?' is shown as projecting down through the bore, and provided with a oontrnllingv spring l: for retaining the valve seated, to lift from internal pressure -Speeioation oi LettersPatent.. Pa'tml'l Juil@ l5.,

Application iiled August 1313. lerizilllkn.

inthe container and permit. escape of gases ,generated inthe container. rlhe stern l? is provided with. a. nut 18; one end of the spri-ngpressinggonthe nut, while-the other gend has its thrust received by the sleeve lil. lf idesired,-a washer-2l may be interposed betweenfthe spring .and 'the ksleeve The conical upper portion 22 of the sleeve bore .constitutes the 4vseat for the valve l5, whieh is shown as globular. rhis arrangement of rounded valve engaging e conical seat, will produce a tight closure for dif1m ferent positions laterally of the valve; the requisite degree of pressure of the valve y.being obtained by adjusting the nut 18.

rlhis type of bung is very simple oon- .struct as it is only necessary to fill up the whole interior of the bung with the fusible material, and then drill out the passage for the valve stem, and form the beveled valve seat portion.

It will' be understood from the foregoing, that the'thrust of both the valve andthe spring member vwill be received directly by thev member formed of fusible material; when the temperature rises inthe region of the container, the fusible member will probably first become plastic or mobile, and the pressure of the-spring member against the lower portion of the fusible sleeve, or through the spring `washer 21, will cause the material of the sleeve to yield, and the spring pressure, together with the internal pressure inthe container, will force the washer upward, to lessen the pressure of the spring and permit further upward movement of thevalve away from its seat, thusl enlarging the exit passage for the confined gas. Thereupon, the high temperature will either permit the washer 'to be forced entirely through the bore of the sleeve 19; or else, the sleeve will become yloosened from its connection with the bung;

might become so `firmly set in the bung that AThe purpose Vof the present` invention is apparent from the foregoing.y Should a rise in temperature occur within the barrel, thev valve 16 is unseated, allowing release of pressure. Should the high temperature continue, then the fusible material of the sleeve 19 willmelt and the whole saft-ty valve is blown out of the bung, providing a large free exit for the escape of vapors and gases in the container. I

Having thus described my inventiomwhat I claim is In a safety closure for containers, a bushing, a sleeve of fusible material forming a lining for the bushing, a valveseated directly on the sleeve and having a stem extendingthrough the bore of the sleeve, and a spring having one end connected with the valve stem and the other end confined by thesaid sleeve whereby the'melting of the sleeve will release the spring and valve to be expelled by the internal pressure` in the container.

WILLIAM H. ll/ICNUTT.

Witnesses: Y

AGNES OLSEN,

EDWIN Bann. 

